AQD - Observation Validity Submitted None Data Dictionary Vocabularies Eionet Data Dictionary Not valid due to station maintenance or calibration Data is considered to be invalid due to the regular calibration or the normal maintenance of the instrumentation (only used for primary data). Valid Data Dictionary Vocabularies Eionet Data Dictionary AQD - Observation Validity Not valid For primary data, data is considered to be invalid due to other circumstances or data is simply missing. For aggregated data, data is not valid because of insufficient data capture following rules set out in Directive and Guidance. Valid Data Dictionary Vocabularies Eionet Data Dictionary AQD - Observation Validity Valid Primary data considered valid by the data provider for its related reporting purposes. Aggregated data is valid following rules set out in Directive and Guidance. Valid Data Dictionary Vocabularies Eionet Data Dictionary AQD - Observation Validity Valid, but below detection limit measurement value given Data considered valid by the data provider for its related reporting purposes. However, the value has been measured below the detection limit and the value reported is the detection limit (only used for primary data). Valid Data Dictionary Vocabularies Eionet Data Dictionary AQD - Observation Validity Valid, but below detection limit and number replaced by 0.5*detection limit Data considered valid by the data provider for its related reporting purposes. However, the value has been measured below the detection limit and the value reported is half of this detection limit (only used for primary data). Valid Data Dictionary Vocabularies Eionet Data Dictionary AQD - Observation Validity Valid (Ozone only) using CCQM.O3.2019 Valid ozone (pollutant code 7) data using new cross section CCQM.O3.2019 (Any ozone previously reported using validation flag 1 is assumed Hearn.1961) Invalid data regardless of cross section to be reported as validation flag -1 Valid Data Dictionary Vocabularies Eionet Data Dictionary AQD - Observation Validity